Board for tobacco-mills



i (No Model.)

' J. MINBTREB.

Board for' Tobacco Mills. 4 No. 235,274. Patent-ed Dec.7,1880.

Z v j 1 I III/4 I UNITED STATES PATENT ()FFICE.

JAMES MINETREE, OF PETERSBURG, VIRGINIA.

BOARD FOR TOBACCO-MILLS.

SPECIFICATION forming part of Letters Patent No. 235,274, dated December 7, 1880,

Application filed July 21. 1880.

To all whom it may concern:

Be it known that I, JAMES MINETREE, of Petersburg, in the county of Dinwiddie and State of Virginia, have invented a certain new and useful Improvement in Boards for Tobacco-Mills; and I do hereby declare the following to be a full and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 represents a top-plan view of a board containing and embodying my improvement; Fig. 2, a longitudinal section of the same, taken on the line w as, Fig. 1; Fig. 3, a perspective view of one of the blocks detached from the backing-plate, and Figs. at and 5 views of modifications of the invention.

Similar letters of reference in the several figures indicate the same parts.

This invention relates to improvements in boards for plug-tobacco mills; and it consists in applying an inclosing band or hands of metal around the wooden blocks that are at tached to the backing-plates, whereby to prevent such blocks from warping, cracking, or expanding laterally and interfering with the easy application and removal of the frame, as I will now proceed to describe.

In the drawings, A represents the wooden blocks having metal face plates B, and secured to a metal backing-plate, O, by rivets D, in the usual manner.

Each wooden block is surrounded bya metal band, E, which may consist of a broad band extending nearly to the upper and lower edges of the wooden blocks, as shown in Figs. 2 and (No model.)

3; or a single stout wire, to, applied centrally, as shown in Fig. 4; or several wires, to, applied as shown in Fig. 5. F is the frame.

In the ordinary boards, inasmuch as the wooden blocks are applied to the backingplates with their grain running at right angles to such plates, the blocks are oftentimes split by the driving through of the securingrivets, and are thereby made to expand laterally into the grooves or spaces between them provided for the frames, so that the latter are caused to bind in or are entirely prevented from entering such spaces. Moreover, the necessary washing of the blocks with hot water to clean them warps the blocks, and similar results follow. By the employment of the bands, however, as contemplated in myinvention, the blocks are prevented from expanding, cracking, or warping, but are, under all circumstances, kept in their proper relative position, so as to leave the spaces for the frame entirely free and unobstructed.

The broad metal bands are preferably employed, though they are not so economical as narrower bands or wires.

I claim as my invention In a board for tobacco-mills, the wooden blocks secured to the backing-plate, and having an encircling metal band, or bands, for preventing them from expanding into the framespaces between them, in combination with the removable frame, substantially as described.

JAMES MINETREE.

Witnesses:

MELVILLE CHURCH, J AS. H. LANGE. 

